Native image server using YAML configuration file

This example shows how to build a native image for a Ktor application using YAML confinguration and GraalVM.

Build

To build the application in native image, you need to execute the following command:

./gradlew nativeCompile

Run

To run the application, you need to execute the following command:

./build/native/nativeCompile/com.example.ktor-sample

The application will be running at https://0.0.0.0:8080/.

Update metadata

If new dependencies are added to the project or a project has been modified, some classes may not be included in the native image. To fix this, you need to update the metadata file.

First you need to run the application with the agent to generate the metadata file:

./gradlew -Pagent run

While the application is running, you need to access basic application functions

It is important to gracefully shutdown the application to generate the metadata file. You can do this by using the Shutdown URL: url: https://localhost:8080/shutdown

Finally, you can copy to the metadata files:

./gradlew metadataCopy --task run --dir src/main/resources/META-INF/native-image

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